Rhodanthe rhymes with:
absinthe, amaranth, billionth, coelacanth, corinth, cynth, drenth, dushyanth, eighteenth, eleventh, eranthe, fifteenth, fourteenth, helminth, hyacinth, hyacinthe, jacinth, jacinthe, labyrinth, millionth, month, nineteenth, ninth, nth, plinth, seventeenth, seventh, sixteenth, tenth, thirteenth, threemonth, umpteenth
Rhodanthe sounds like:
radant, radiant, radmund, rationed, readmit, readmitted, red-handed, redeemed, redhanded, redmond, redmund, redondo, redound, retained, retinoid, rodent, rodmond, rodmund, rotondi, rotondo, rotund, rotunda, rotundo, rudiment, rudnet